Coordinate input apparatus

Details Coordinate input apparatus Coordinate input apparatus

1990-12-21

1992-03-17

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

340706, G08C 2100

Patent

active

050971026

ABSTRACT:
A coordinate input apparatus for detecting a vibration transmitted from a vibration input pen by a plurality of vibration sensors arranged on a vibration transmission member, and for determining coordinates of the vibration input pen from vibration propagation times required between the position of the vibration input pen to the positions of the vibration sensors, includes a vibration-isolating member formed in a peripheral portion of the vibration transmission member. The vibration-isolating member has a multi-layered structure consisting of a plurality of vibration-isolating layers formed so that a layer nearer to the vibration transmission plate has a lower acoustic impedance than that of a layer farther from the vibration transmission plate.

REFERENCES:
patent: 4980518 (1990-12-01), Kobayashi et al.

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